The CDC has said the outbreak is among patients who received epidural steroid injections that were made by the New England Compounding Center, a specialty pharmacy in Framingham that has issued a recall for all its products.

This form of meningitis is not contagious and symptoms include fever, new or worsening headache, neck stiffness, sensitivity to light, increasing pain, and redness or swelling of the injection site.

The 11 states with cases are Florida, Idaho, Indiana, Maryland, Michigan, Minnesota, New Jersey, North Carolina, Ohio, Tennessee and Virginia.